Effect of oxide-based fluxes on mechanical and metallurgical properties of Dissimilar Activating Flux Assisted-Tungsten Inert Gas Welds
Effect of oxide-based fluxes on mechanical and metallurgical properties of Dissimilar Activating Flux Assisted-Tungsten Inert Gas Welds
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DOI：
10.1016/j.jmapro.2013.11.001
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发表时间：
2014
影响因子：
6.2
通讯作者：
Sanjay G. Nayee;V. Badheka
中科院分区：
文献类型：
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作者：
Sanjay G. Nayee;V. Badheka
本研究的目的是研究活化剂对不同活化剂钨惰性气体焊缝力学和冶金性能的影响。在活化剂-钨惰性气体焊接工艺下，研究了电流、焊接速度、接头间隙和焊条直径对碳钢与不锈钢6mm厚异种焊缝焊缝焊缝尺寸的影响。在本研究中，使用了三种不同类型的氧化物粉末：tio2、ZnO和MnO2。焊接后对样品进行力学测试，并通过普通钨惰性气体焊和活性助焊剂钨惰性气体焊的显微硬度和显微组织进行表征。激活剂tio2和ZnO是钨钨惰性气体焊接的有效助焊剂，在tio2和ZnO助焊剂下的深度/宽度（D/W）比在普通钨惰性气体焊接中最高。与普通钨惰性气体焊接相比，在tio2焊剂下观察到的角畸变最小。活性焊剂-钨惰性气体焊接的力学性能和接头效率均高于普通-普通钨惰性气体焊接。两种工艺的拉伸试样从母金属（碳钢侧）失效。碳从CS向SS迁移，导致焊缝从CS侧破坏。
Present investigation is to study the “Effect of Activating Fluxes on Mechanical and Metallurgical Properties of Dissimilar Activated Flux-Tungsten Inert Gas Welds”. Effect of current, welding speed, joint gap and electrode diameter on weld bead dimensions on 6 mm thick dissimilar weld between carbon steel to stainless steel, was studied under Activated Flux-Tungsten Inert Gas Welding process. During this investigation three different types of oxide powders were used-TiO2, ZnO and MnO2. After welding samples were subject to mechanical testing, in addition to characterization via micro hardness and microstructures of Normal Tungsten Inert Gas Welds and Activated Flux-Tungsten Inert Gas Welds. Activating fluxes TiO2and ZnO are effective fluxes for Activated Flux-Tungsten Inert Gas Welding of dissimilar weld between CS to SS. Highest depth/width (D/W) ratio reported under TiO2and ZnO fluxes compare to Normal-Tungsten Inert Gas Welds. Lowest angular distortion was observed under TiO2flux compare to Normal-Tungsten Inert Gas Welds. Mechanical properties, Joint Efficiency of Activated Flux-Tungsten Inert Gas Welds are higher than normal-Normal Tungsten Inert Gas Welds. Tensile Test specimens of both the processes failed from the parent metal (carbon steel side). Carbon migration from CS to SS, had occurred which led to failure of weld joints from CS side.